I'm apparently the not so proud owner of yet another broken oscilloscope. This time it's a Tek 2205 with a sick power supply section.
The eBay guide says that the 2205 is not a very wonderful scope:
"Stay away from the 2205, 2225 they were made in the orient, and have serious quality issues as used scopes." Oh well. At least it was free.
The outputs of all the various PS voltages are low (not zero). For example, the 250v line measures about 15VDC. I've checked all the big caps with an ESR tester and found nothing unusual or suspicious. When I first inherited the scope, the green pilot light came on but nothing else. By the time I got it open and started making measurements, the green pilot light went away. I disconnected all the various power supply connections (that conveniently run through 0 ohm jumpers) but the power supply lines still have low output, even with no load. I have a schematic and service manual.
However, I'm also lazy, have better things to break, and really don't know why I'm bothering to fix a 20MHz scope. Are there any common or chronic problems with the 2205 power supply section to check before I dive into the mess, rip it apart, and probably electrocute myself in the process?